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On 19.01.26 19:26, Juergen Gross wrote:
> While looking at paravirt cleanups I stumbled over slow_down_io() and
> the related REALLY_SLOW_IO define.
>
> Do several cleanups, resulting in a deletion of REALLY_SLOW_IO and the
> io_delay() paravirt function hook.
>
> Patch 4 is removing the config options for selecting the default delay
> mechanism and sets the default to "no delay". This is in preparation of
> removing the io_delay() functionality completely, as suggested by Ingo
> Molnar.
>
> Patch 5 is adding an additional config option allowing to avoid
> building io_delay.c (default is still to build it).
>
> Changes in V2:
> - patches 2 and 3 of V1 have been applied
> - new patches 4 and 5
>
> Changes in V3:
> - rebase to tip/master kernel branch
>
> Changes in V4:
> - add patch 1 as prereq patch to the series
>
> Juergen Gross (6):
> x86/irqflags: Fix build failure
> x86/paravirt: Replace io_delay() hook with a bool
> block/floppy: Don't use REALLY_SLOW_IO for delays
> x86/io: Remove REALLY_SLOW_IO handling
> x86/io_delay: Switch io_delay() default mechanism to "none"
> x86/io_delay: Add config option for controlling build of io_delay.
>
> arch/x86/Kconfig | 8 +++
> arch/x86/Kconfig.debug | 30 ----------
> arch/x86/include/asm/floppy.h | 31 ++++++++--
> arch/x86/include/asm/io.h | 19 ++++---
> arch/x86/include/asm/irqflags.h | 6 +-
> arch/x86/include/asm/paravirt-base.h | 6 ++
> arch/x86/include/asm/paravirt.h | 11 ----
> arch/x86/include/asm/paravirt_types.h | 2 -
> arch/x86/kernel/Makefile | 3 +-
> arch/x86/kernel/cpu/vmware.c | 2 +-
> arch/x86/kernel/io_delay.c | 81 +--------------------------
> arch/x86/kernel/kvm.c | 8 +--
> arch/x86/kernel/paravirt.c | 3 +-
> arch/x86/kernel/setup.c | 4 +-
> arch/x86/xen/enlighten_pv.c | 6 +-
> drivers/block/floppy.c | 2 -
> 16 files changed, 63 insertions(+), 159 deletions(-)
>